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Analyzing Weather Windows for Work Boat Selection: Insights from Seasonality and Conditions

This study explores the concept of weather windows for work boat selection, focusing on factors like seasonality, wind speed, and wave height. Key features include joint and conditional probabilities of wind and wave conditions, with an emphasis on how duration and thresholds impact operational windows. The research reveals significant trends, particularly that small work boats are more affected by sea conditions, while larger vessels have more stable operating windows, especially in milder climates like the US compared to harsher conditions of the Irish Sea.

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Analyzing Weather Windows for Work Boat Selection: Insights from Seasonality and Conditions

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  1. Data Analysis • The Concept of Weather Window • The Features of Weather Window • Seasonality • Duration • Probabilities of Total Available Window • Selection of Work Boats

  2. Weather Window • Threshold Wind Speed w and Wave Height Hs • Duration

  3. Seasonality

  4. Probabilities of Weather Window • Joint Probability of Wind and Waves • Conditional Probability if Consider Available Duration • w: wind speed; Hs: wave height; subscript t: threshold

  5. The Impact from Seasonality • Spring, Summer-Autumn, Winter • One Condition: w = 6 m/s, Hs = 2 m

  6. The Impact from Threshold Duration

  7. Selection of Work Boats • 3 Categories of Work Boats • Large • Medium • Small

  8. Selection of Work Boats

  9. Selection of Work Boats

  10. For Johnston, Conclusion • The model we developed is able to capture the influence of seasonality and threshold duration; • Trends between seasons are similar between Irish Sea and Delaware coast except Irish sea has a harsher winter; • Small work boats are more vulnerable to sea conditions. They have longer working windows in US job for the milder sea state.

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